KUALA LUMPUR — Malaysia has lifted an emergency declaration in Sarawak’s Serian Division after severe wildfire smoke pushed air pollution to hazardous levels, but authorities are warning that the improvement does not mean the region’s haze problem is over.

The emergency was removed on September 7 after the latest Air Pollutant Index readings in Serian fell below the hazardous threshold. The decision followed assessments by federal and Sarawak authorities and came only days after the area was placed under emergency measures because of dangerous air pollution.

Emergency Lifted After Pollution Falls

Malaysia declared the emergency in Serian on September 4 after pollution levels surged dramatically.

The Air Pollutant Index in Serian reached more than 500 during the worst period, crossing the level considered serious enough to trigger emergency action. Authorities subsequently introduced measures aimed at protecting residents and limiting exposure to polluted air.

On Monday, however, official readings showed conditions had improved sufficiently for the emergency declaration to be withdrawn.

The Malaysian government stressed that the decision was based on the latest air-quality data and did not mean that all haze-related risks had disappeared.

Indonesian Fires Behind the Haze

The pollution has been linked to fires on the Indonesian side of Borneo, particularly in the Kalimantan region.

Smoke from forest and peat fires can travel across national borders, creating recurring haze episodes across parts of Southeast Asia. Sarawak, which shares the island of Borneo with Indonesian territory, has been particularly exposed to the latest episode.

The transboundary nature of the smoke makes the problem difficult for Malaysia to resolve on its own. Even when local Malaysian air quality improves, changes in wind direction and fire activity in neighboring areas can quickly alter conditions.

Schools and Daily Life Were Disrupted

The severe pollution affected normal activities across parts of Sarawak.

Schools were closed in affected areas as air quality deteriorated, while residents were advised to reduce exposure to outdoor pollution. The emergency declaration also allowed authorities to introduce stronger protective measures in Serian.

The episode has affected businesses and communities as well, with residents facing reduced visibility and concerns about spending extended periods outdoors.

Sarawak’s capital, Kuching, also experienced hazardous air during the worst phase of the episode.

Air Pollution Remains a Health Concern

Although the emergency has ended, officials continue to emphasize caution.

Fine particles contained in wildfire smoke can penetrate deep into the respiratory system, making prolonged exposure particularly concerning for vulnerable groups. The Malaysian authorities therefore continue monitoring pollution levels and advising the public to follow health guidance.

The situation also illustrates how quickly air-quality conditions can change during major regional fire events.

Cloud Seeding Used During Crisis

Authorities turned to weather modification efforts during the worst phase of the haze.

Cloud-seeding operations were conducted as part of attempts to encourage rainfall and improve atmospheric conditions. The operations were extended as officials assessed weather conditions that could support further efforts.

Rain can help remove pollutants from the atmosphere, although it cannot by itself eliminate the underlying source of smoke when fires continue burning.

Southeast Asia Faces Recurring Haze Threat

Cross-border haze is a longstanding environmental problem in Southeast Asia.

Forest and peat fires in Indonesia have repeatedly affected neighboring countries including Malaysia, Singapore and Brunei. Dry weather can allow fires to expand rapidly, while wind patterns determine which countries experience the worst pollution.

This year’s episode has once again highlighted the need for stronger regional cooperation over fire prevention, land management and pollution monitoring.

Climate Risks Add to the Challenge

The Sarawak emergency comes as scientists and international agencies are warning about the wider impact of increasing wildfire activity.

The World Meteorological Organization said on September 7 that wildfires and heatwaves are increasingly threatening global air quality. It warned that wildfire smoke releases pollutants including fine particulate matter and ground-level ozone, creating risks that can extend far beyond the areas where fires originate.

The agency has also called for stronger monitoring of pollutants and closer coordination between climate and air-quality policies.

Emergency Ends, Monitoring Continues

For residents of Serian, the lifting of the emergency provides some relief after several days of dangerous conditions.

But authorities are not treating the development as the end of the crisis. Continued monitoring will be necessary because pollution levels could rise again if fires intensify or weather conditions push more smoke toward Sarawak.

The latest episode has demonstrated how quickly a regional wildfire problem can become a public-health emergency across an international border.

For Malaysia, the immediate priority is to protect residents as conditions stabilize while working with neighboring countries to reduce the risk of another severe haze episode.